2pcs Coupling Hub for 4 mm Shafts Please allow 4-6 days processing before ship out. For gearmotors or similar motors, we don’t ship using epacket and will use regular shipping if needed. Please note that regular shipping like singapore post might take 45-60 days to deliver, epacket 20 -35 days to deliver Thank you for understanding. » Gearmotors » Accessories » 2pcs Coupling Hub for 4 mm Shafts This coupling hub allows secure coupling of a variety of mechanisms to 4 mm motor shafts. SKU: JSL13282219971 Price: 9.57 $ Product in stock SSL Certificate Quantity Updating cart... Overview This coupling hub allows secure coupling of a variety of mechanisms to 4 mm motor shafts. Specifications Length: 15.5 mm Inner Diameter: 4 mm Outer Diameter: 22.5 mm Related Products JA12-N20 DC Gearmotor (600 RPM at 12 V) 30pcs 2 x 9.5 mm Shaft GA12-N20 Micro Gearmotor 12GAN20-10 500 RPM with 10 mm long shaft JGA25-370 DC Gearmotor (1931 RPM at 12 V) JGA25-370RC DC Gearmotor with Extended Axis (645 RPM at 12 V)